You know it’s time to clean your microwave oven when unpleasant odours fill the kitchen every time you open the appliance door. Knowing how to clean your microwave can be a bit daunting, however, because there are many different products on the market that purport to be the “best” way to clean a microwave. Fortunately, there are at least a couple of easy ways to get the job done using common household items that may already be in your pantry.